Patent DE-102010041277-A1 (DE)
Title: Electrical energy store for a drive system, comprises an energy storage device, a heat sink, a peltier element, an electrically insulating layer, a housing enclosing an interior space, cooling devices, and a control unit
Inventor: HUBER NORBERT
IPC: H01M50/204
Filed: 2010-09-23
Abstract: The electrical energy store (2) comprises an energy storage device (201), a heat sink (3), a peltier element (5) arranged in the heat flow between the energy storage device and the heat sink, an electrically insulating layer (204), a housing enclosing an interior space, cooling devices connected with one another and connected to the energy storage device and the heat sink, and a control unit. The insulating layer is arranged between the peltier element and the energy storage device, and comprises a deformable material. The peltier element: is connected with the heat sink by thermal grease. The electrical energy store (2) comprises an energy storage device (201), a heat sink (3), a peltier element (5) arranged in the heat flow between the energy storage device and the heat sink, an electrically insulating layer (204), a housing enclosing an interior space, cooling devices connected with one another and connected to the energy storage device and the heat sink, and a control unit. The insulating layer is arranged between the peltier element and the energy storage device, and comprises a deformable material. The peltier element: is connected with the heat sink by thermal grease, a solder or a weld joint and arranged between the first heat sink and the second heat sink; and has a first cooling side for cooling the peltier element in the operation and a second heating side for heating the peltier element in the operation. The energy storage device and the peltier element are arranged in the interior space, where the heat sink is a component of the housing. The heat sink is a liquid heat sink or an air cooling heat sink. The energy storage device includes a double layer capacitor and/or a rechargeable battery. The cooling device further comprises the heat sink, the peltier element, and a chiller for cooling a coolant running through the first and/or second heat sink. The first cooling side assigns on the first heat sink and the second heating side assigns on the second heat sink. The control unit turns off the peltier element when the ambient temperature falls below a predetermined temperature value that is less than or equal to the predetermined temperature value. The first and second heat sinks are the liquid heat sink, which includes a common cooling circuit. The cooling device is: configured in such a way that the first heat sink is mechanically connected with the energy storage module and on a deformable insulating layer, the first cooling side of the peltier element is mechanically connected with the first heat sink and/or the second heating side of the peltier element is mechanically connected with the second heat sink by the insulating layer of solder and/or thermal grease and/or deformable material, and the first liquid heat sink and/or the second liquid heat sink flows through the cooling circuit of the coolant in the operation; and separated from a energy storage module, where the first liquid heat sink is thermally connected or connectable to the electrical energy store over the coolant flowing through the cooling circuit. The cooling circuit includes a first cooling circuit for the thermal connection of the first heat sink in the energy storage module, and a second cooling circuit through which the coolant flows, where the second cooling circuit is operated separately from the first cooling circuit. The second cooling circuit is designed as the liquid heat sink through which the second heat sink and the cooler passes. The first cooling circuit and the second cooling circuit are interconnected such that a single cooling circuit is formed through which the first and second heat sinks, the cooler and the energy storage module passes. The single cooling circuit is operable such that the cooling circuit of: the first heat sink, the second heat sink designed as the liquid heat sink, the cooler, and the energy storage module passes through the single cooling circuit; and the second heat sink, the cooler and the energy storage module passes through the first heat sink bridges. The cooler is part of the separate module and is located on the second heat sink to cool it. An independent claim is included for a cooling device for cooling an energy storage device.